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Cancer Biology BIO346 Ch. 3
Chapter 3
12
Biology
Undergraduate 3
05/08/2012

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Term
endothelial cell
Definition
cell type that lines the internal surface of blood and lymphatic vessels
Term
vascular endothelial growth factor (VEGF)
Definition
triggers angiogenesis by binding to a specific receptor protein located on surface of endothelial cells.
Term
VEGF receptor
Definition
can be activated by binding to VEGF
Term
angiostatin
Definition
inhibitor of angiogenesis; fragment of the protein plasminogen
Term
thrombospondin
Definition
inhibits angiogenesis.
Term
invasion
Definition
direct migration and pentration of cancer cells into neighboring tissues.
Term
cell-cell adhesion protein
Definition
molecules that function to keep cells in place by binding interaction among them on the outside of a cell. cancer cells often have very few of these if any at all.
Term
protease
Definition
protein-degrading enzyme. Break down structures that represent barriers to cancer cell movement.
Term
plasmin
Definition
active protease form of plasminogen. It degrades componenets of the basal lamina and the extracellular matrix (good for invasion) and cleaves inactive precursors of MMPs into active enzymes.
Term
tumor progression
Definition
the gradual change in the properties of a tumor cell population as cells acquire more and more aberrant traits and become increasingly aggressive.
Term
cytotoxic T lymphocyte (CTL)
Definition
class of immune cell specialized for attacking foreign and abnormal cells. lung cancer in mice: CTLs target A9 cells instead of D122 because of MHC molecules carried by A9 cells and not D122 cells.
Term
metastasis promoting gene
Definition
positively acting genes that code for proteins that stimulate events associated with invasion and metastasis.
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